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Just installed mechanical oil gauge. what should oil pressure readings be?

Discussion in 'Pre-1994 trucks, commercial vehicles' started by upser145, Jun 11, 2017.

  1. upser145

    upser145 Member

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    Just put a new oil gauge in my 88 w150 with a 360 just wondering what hot and cold oil pressure should be at idle
     
  2. upser145

    upser145 Member

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    why is my oil pressure light still functioning with the sending unit unhooked also
     
  3. valiant67

    valiant67 Rich Corinthian Leather
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    If your truck originally had an oil pressure gauge and oil light, they use separate sending units.
     
  4. upser145

    upser145 Member

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    oh i did not know this. I have haerd about 10 psi for every 1000 rpm when hot idling is this about right?
     
  5. Bob Lincoln

    Bob Lincoln "CHECK FAULT CODES"
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    Depends on engine and condition of engine, temperature and viscosity of oil used, but often about 14-20 psi at idle, and then roughly 10 psi per 1000 RPM above the idle reading. Oil pressure lights typically come on around 4 psi, and as low as 7 psi hot at idle is considered the minimum safe.
     
    ImperialCrown likes this.
  6. upser145

    upser145 Member

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    Alright thanks
     
  7. bguy

    bguy Well-Known Member

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    I believe on the LA engines 8 psi puts the light out.
     

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